Ventilator



J. SYLVAN.

I VENTILATOR. APPLICATION FILED MAY], 1920.

Patented Mar. 28, 1922'.

2 SHEETSSHEET I. 23

LSYLVAN.

VENTILATOR. APPLICATION FILE! MAY 7. 1920.

1,410,624. Patented Mar. 28, 1922 2 SHEETS-SHEET 2.

JOSEPH SYLVAN, OF CHICAGO, ILLINOIS.

VENT ILA'IOR.

Specification of Letters Patent.

Patented Mar. 28, 1922.

Application filed May 7, 1920. Serial No. 379,436.

o all whom it may concern.

Be it known that I, JOSEPH SYLVAX, a citizen of the United States, and a resident of Chicago, in the county of Cool: and State of Illinois, have invented certain new and useful Improvements in Ventilators; and I do hereby declare thatthe following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in ventilators for roofs, skylights and the like and consists of the matters hereinafter described and more particularly pointed out in the appendedclaims.

The object of the invention is to provide a ventilator of the kind described, which embodies the advantages of both a rotary type and a stationary type of ventilator, without the disadvantages usually encountered in either of said type of ventilator. The various advantages of the invention will more fully appear as I proceed with my specification.

In the drawings 2- l Fig. 1 is a view in front elevation of a ventilator embodying my invention.

Fig. 2 is a view in side elevation of the same. V

Fig. 3 is a top plan View of the ventilator.

Fig. 4 is a horizontal, sectional view on %n enlarged scale, taken on theline 44 of Fig. 5 is a vertical, sectional view, taken on line 5-5 of Fig. 2.

Fig. 6 is another vertical, sectional view taken on the line 6-6 of Fig. 5.

Fig. 7 is a perspective view of a shield embodied in my improved ventilator.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawings :-10 indicates the tubular stem of the ventilator and, 11 indicates the conical top or hood therefor.

The stenr 10 has oppositely disposed sidev openings 12, which extend downwardly a suitable distance from the top,- said openings being more particularly defined by spaced, upright flanges 13, forming a part of said stem.

Ext-ending outwardly fromsaid stem at the bottom ends of said openings, are horizontally disposed, substantially triangular plates 14, arranged with one of their points outermost and in line with the axes of said side openings 12. Brackets 15 extending upwardly and outwardly from the stem 10 below said openings and fixed to the under-- side of the pointed ends of said plates, together with depending side flanges on said plates, act to impart strength and rigidity thereto. The top 11, includes oppositely disposed, triangular extensions 16, arranged above and in vertical alignment with the triangular plates 14 at the bottom ends of the openings 12.

17-17 indicate upright shield members which are spaced outwardly from the openings l2 and are pivoted so as'to becapable of a limited, swinging movement about vertical axes provided in the pointed ends of plates 14 and top extensions 16, as will be more particularly pointed out later. Said shields are normally arranged in parallel relation in planes at right anglesto the axes of said openings 12-12. Each shield includes a main, rectangular body part 18 which is preferably of a height equal to that of said openings 12 and of a width approximating the diameter of the stem 10. Said body part 18 has side flanges or wings 19, which arebent inwardly from the plane of the body toward the stem 11, the margins of said wings being curled to stiffen the same.

Each Shield is provided at the top end of its body with outwardly extending, inverted V-shaped flanges 20 and at itsbottom with outwardly and inwardly extending inclined flanges 21-22, the purpose of whichwill hereinafter appear.

F ixedto the top end of each shield on its median line, are inwardly and upwardly extending vanes 28 which are rigidly connected thereto by oppositely disposed brace plates 24 so arranged as to overhang the triangular extensions 16 of the .top -11, when the shields, are in place upon the stem. To stiffen the body of the shields 17, 1 provide horizontal braces 25-26 in the form of angle bars, fixedto the innersu'rfaces of said body at the top and bottom thereof.

Secured to the under surface of the extensions 16 of the top 11, is a transversely disposed, horizontal brace rod' 27, which is looped at its center to provide an eye 28 and has its ends bent downwardly to provide depending pivot pins 29 which are adapted to extend through suitable holes in the top angle bars 25 carried on the inner surface of the body of the shields. Removable pins which are vertially aligned with the pivot pins 29 are entered through holes in the bot tom brace bar 26 and through the outer pointed ends of the plates 14- to provide the pivot, for the bottom end of: said shields. A ball 31 surrounds each pin 30 between the top surface of the plates 14 and the bottom surface of the angle bar 26 to provide an antifriction bearing to sustain the weight or vertical end thrust oi. said shields.

To the inner surface of the shields at its middle and near the bottom brace-bar 26 and pivoted to swing vertically about a horizontal axis, are arms 35 which extend inwardly beyond the center of the stem. Said arms are preferably made of a rod bent into an elongated U-shaped form, with its closed loop at the inner end and its open end spread out to be engaged in bearing clips 36 fixed to the inner surface of the body 18 01": the shield on each side of its vertical median line. The inner, looped end of one arm overhangs the inner, looped end of the other and a pendulum rod 37 depending from the eye 28 ot the brace rod 27 extends through the loops of said overhanging ends.

To the bottom end of the pendulum rod 37 is seemed a resilient bumper block 88 in the form of a rubber ball. Surrounding said rod between the bumper 38 and bottom1nost arm 35 is a metallic ball 39 and similar balls surround said pendulum rod between said arms andabove the topmost-arm Said balls provide the necessary weight for the pendulum and hold said overhanging arms in proper spaced relation to prevent any binding-action between them. The arms 35 are normally inclined upwardly "from the shields so that any moisture or water collecting upon them will be directed outwardly toward the shields, so that it will not fall downwardly through the stem.

lssume that a brisk wind is blowing in the direction of the arrows shown in Fig. 3. Said wind will impinge on the flanges 19 'lacing the wind and also on the vanes 28 and act to swing the facing flange inwardly toward the stem. The arms 35 will act to swing the other shield in a reverse direction so that both shields now assume the relative position shown in dotted lines in Fig. i. As said shields swing into this position, the arms 35 will carry the pendulum into the dotted line position shown in Fig. 6, the rubber bumper impinging against the inner surface of thestem without noise and defining the limit oi movement of the shields. Vith the parts in this position, the spacedapart edges of said flanges define an opening of reduced area for the wind to pass through. Such wind entering this reduced opening impinges against the stem and is deflected outwardly against the inner surfaces of the flanges 19 to be directed past the side openings 12 in the stem, to establish an aspirating or suction ell'ect out through said opening and thus produce an up-draft through the stem and openings to ventilate the room be low. It is to be here noted that the flanges on the opposite side of the ventilator are wide open so as to allow l'ree passage otnot only the wind passing through said open ings but also such air as is drawn up through the stem so that there is ample area for the discharge of wind and air. Thus norestriction or choking of the discharge opening occurs, which would of course produce a downdrai't through the stem. lVitla the parts in this position, andthe wind blowing-in the direction mentioned, rain or snow carried in with the wind will pass out through the op posite side, it being deflected away from the side openings 12 so that it cannot enter the" stem. When the wind calms or dies down, the pendulum 37 will tend to swing by gravity into its normal, vertical position and will act on the arms 35 to return the shields to their normal, parallel. relation. If only a mild breeze now occurs in thesame dircction. it will pass through thespace between V the edges of the flanges 19 to strike the stem and be deflected against the inner surfaces of the body of the shields to pass the side openings and then out through the opposite side of the ventilator, said breeze establishing a mild suction up through the stem as before.

Should the wind be blowing insuch a direction as. to impinge squarely upon the outer surface of the body of one shield, its

action of course will be balanced and it will not act to swing either shield, but it will be deflected outwardly on each wing of the shield, to again produce its suction action .on the curled margins of the wings, which of course will be felt at the side openings 12 to produce an rip-draft through the ventilator.

Should the wind come in gusts, a little.

these swirls cannot enter'the side openings 12, the braces 2st for the vanes acting to deflect downward swirls, from entering said openings at the top as well as directing rain or snow outwardly and away :lrom'sai'd openings.

It is apparent lato'r readily accommodates itself to "any wind as doesthe rotary type of ventilator;

l l O that my improved venti and is capable of withstanding high wind' pressure in the same manner as a stationary ventilator, at the same'tlme eliminating all possibility of down-drafts. The shields may be applied either in theworkshop or on the job andmay. be easily removedv 'hen it is desired to paint or otherwise work upon-the interior of the ventilator. i v ,liVhile in describingniy invention, I have referred to certain details of mechanical construction and arrangement of parts, I

2. A ventilator for roofs, syklights and thelike, comprising a stem having oppositely disposed.sideopenings,.a top for said stein. upright shields spaced outwardly from said openings and normally arranged in parallel relation mam right angle to the axes of said openings, said shields being capable of a limited rotative movement-about a vertical axis, and means-extending through said side openings and operativelyconnecting said shields together, to transmit the rotative movement of one shield to the other but in an opposite direction.

3. A ventilator for roofs, skylights and the like, comprising a stem having oppositely disposed side openings, a top for said stem, upright shields spaced outwardly from said openings and normally arranged in parallel relation and at'a right angle to the axes of said openings, said shields being capable of a limited rotative movement about a vertical axis, means extending through said side openings and operatively connecting said shields together to transmit the rotative movement of one shield to the other but in an opposite direction, and means acting to return said shields to their normal parallel relation. 7

1, A ventilator for roofs, skylights and the like, comprising a stem having oppositely disposedside openings, a top for said stem, upright shields spaced outwardly from said openings and normally arranged in parallel relation and at a right angle'to the axes of said openings, said shields being capable of a limited rotative movement about a verical axis, means extending through said side openings and operatively connecting said shields together to transmit the rotative movement of one shield to the other, but in an opposite direction, and means acting on said connecting means to return said shields to their normal, parallel relation.

A ventilator for roo'ls, skylights and shields being the like, comprising a stem having oppositely disposed side openings, a top for said stem, upright shields spaced outwardly from-said openings and normally arranged in parallel relation and at. a right angleto the axesot said openings, said-shields being capable of a limited rotative movementabout a vertical axis, arms connected at their outer ends to said shields, theinner ends of said arms extending through said side openings, and gravity meanswithin said stem acting on the inner ends of said arms for returning said shields to their normal, parallel relation.

6. A ventilator for root's, skylights and the like, comprising a stem having oppositely disposedside openings, at top forsaid stem, upright shields spaced outwardly from. saidopenings and normally arranged in parallel relation and at a right angle to the axes of said openings, saidshieldsbeing capable; of a limited rotative movement about a vertical axis, arms pivotally connectedat their outer ends to'said' shields, the innerends of said arms extending through saidv side openings and beyond the vertical axis ofsaidstem, and a gravity pendulum associated-with the inner ends of said arms for returning said shields-to their normal parallel relation l 7; A ventilator,ifors rooisi skylights and;

the like, comprising a stem having oppositely disposed side openings, a top for said stem, upright shields spaced outwardly from said openings and normally arranged in parallel relation and at a right angle to the axes of said-openings, said shields being capable of a limited rotative movement about a vertical axis, arms pivotally connected at their outer ends to said shields, the inner ends of said arms extending through said side openings and beyond the vertical axis of said stem, a gravity pendulum suspended fromthe top of said stem, and operatively connected with the inner ends of said arms for returning said shields to their normal, parallel relation, and a resilient bumper carried by the bottom end of said pendulum.

8. A ventilator for roofs, skylights and the like, comprising a stem having oppositely disposed side openings, a top for said stem having opposite side extensions in line with the axis of said side openings, opposite floor plates extending outwardly from said stem, at the bottom of and in line with the axis of said side openings, a brace member fixed to said top 'on its under side, said member including a central eye and depending end extensions, upright shields spaced outwardly from said openings and normally arranged in parallel relation and at a right angle to the axes of said side openings, said pivoted at their top to said depending end extensions, pivot pins connecting the bottom ends of said shield to the ends of said floor plates, arms extending inwardly said vanes extending inwardly toward each.

other above said top andbeing arranged at right angles to said shlelds, and means extending through said side openings to trans mit the rotative movement of one shield to the other but in an opposite direction.

lOJA-vntilator for roofs, skylights and the like, comprislng a stem having oppo-' sitely disposed side openings, a top for" said stem, uprightshields spacedoutwardlyfrom said openings and normally arranged in parallel-relation and ate right angle to the axes of said side openings, sald shields belngca-pable of a limited rotative movement, and includ ng side deflecting wings, and top and bottom deflecting flanges, and means extend ing through-said sideopenin gs for connecting said shields together, said means acting to sitely disposed side openings, a top for said stem, upright shields spaced outwardly from said openings and normally arranged in par allel relation and at a right angle to th'eaxes of said side openings,-said shields being capable of a limitedrotative' movement, and including side deflecting Wings and top and bottom deflecting flanges, vanes fixed to' the top endsof said shields, saidvanes extending inwardly toward each other above said top, and being arranged at right angles to said shields, and meansextending through said side openings and connecting said shields together,;said means acting'to transmit the rotative movement of one shield to the other but in an opposite"direction.

In testimony that 'Iclaim'the foregoing as my'invention, I 'aflix my signature in the presence of two witnesses,this 4th day of May, 111920. N a i f iosnrn synvanp Witnesses: 1 a V V HENRY STAAR, v

1'1.I-I.ALFRnns.-v Q 

